There are lots of quite nice CREE Q-5 lights that would fit your requirements. I have one that I bought recently as a prize for some kids. The dimensions are 3.25" X 1/2"D and it weighs less than an ounce with the battery. The case is aluminum. It is bright so I wonder how long it will run before the battery runs out. A slightly larger version use the 18650 Li-ion battery I prefer to use. The $60 SCr AA flashlight looks like a solution in search of a problem. Who on earth needs all of those different lumen choices? Anything below 20 lumens is as worthless as the old incandescent flashlight. 3.2, 1.1, 0.3 and 0.1 lumens? Those would be invisible during the day and not much good at night either.


CREE Q5 LED flashlight uses 18650 battery $1.95 postpaid 1pc 1000LM Cree Q5 LED Tactical Flashlight Zoom Adjustable 3 Modes Torch LampST1 | eBay
Similar one with dimensions 4.3"L 1"D

3 Modes CREE Q5 LED 18650 Battery Waterproof Flashlight Focus Lamp $2.09 postpaid 8000 LM 3 Modes CREE Q5 LED 18650 Battery Waterproof Flashlight Focus Lamp TR